Matheas Manssen mentioned this to All:
 MM> Memo.seltext:='*'+Memo.seltext+'*';
 MM> This works fine for small strings, but when using string > 256 chars(I
 MM> think), the first 256 chars of the selected text stay on the screen, but
 MM> the rest disappears... :-(( What am I doing wrong?
The problem is that SelText returns a string... which can only be up to 255 
characters.  Instead, you will have to use GetTextLen and GetTextBuf to 
retreive the text to a buffer you allocate yourself, and SetText to assign 
the modified text to the control.
                                ...Gary
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